1. ARC‐Centre for Mine Site Restoration, Department of Environment and AgricultureCurtin University Kent Street Bentley 6102 Australia
2. Department of Biology and Biotechnology ‘L. Spallanzani’University of Pavia via Ferrata 1 27100 Pavia Italy
3. Department of Plant and Wildlife SciencesBrigham Young University Provo UT 84602 U.S.A.
4. USDA‐ARS Northwest Watershed Research Center Boise ID 83702 U.S.A.
5. The Nature Conservancy Bend OR 97702 U.S.A.